- 您现在的位置：买卖IC网 > Sheet目录17350 > AD588ARWZ (Analog Devices Inc)IC VREF SERIES PREC ADJ 16-SOICW
AD588
A practical consideration when using the 4-wire ohms
technique with an RTD is the self-heating effect that the
excitation current has on the temperature of the RTD. The
designer must choose the smallest practical excitation current
that still gives the desired resolution. RTD manufacturers
usually specify the self-heating effect of each of their models or
types of RTDs.
current for a 100 Ω RTD. The small excitation current of 1 mA
dissipates a mere 0.1 mW of power in the RTD.
BOOSTED PRECISION CURRENT SOURCE
In the RTD current-source application, the load current is limited
to ±10 mA by the output drive capability of Amplifier A3. In the
event that more drive current is needed, a series-pass transistor
can be inserted inside the feedback loop to provide higher
current. Accuracy and drift performance are unaffected by the
pass transistor.
BRIDGE DRIVER CIRCUITS
The Wheatstone bridge is a common transducer. In its simplest
form, a bridge consists of four two-terminal elements connected
to form a quadrilateral, a source of excitation connected along
one of the diagonals and a detector comprising the other
diagonal.
excitation supply. EO, a differential voltage, is proportional to
the deviation of the element from the initial bridge values.
Unfortunately, this bridge output voltage is riding on a
common-mode voltage equal to approximately V IN /2. Further
processing of this signal may necessarily be limited to high
common-mode rejection techniques, such as instrumentation
or isolation amplifiers.
from a pair of bipolar supplies. This configuration ideally
eliminates the common-mode voltage and relaxes the
restrictions on any processing elements that follow.
R B
7
6
4
3
A3
1
R C
VISHAY S102C
OR SIMILAR
R B
7
6
4
3
A3
1
220 ?
V CC
Q 1
A1
R1
R4
AD588
14
R C = 10k ?
A1
R1
R4
AD588
14
1.0mA
R2
R5
A4
15
0.01%
+
R2
R5
A4
15
I L =
R3
5
9
A2
10
8
12
R6
11
13
2
16
+V S
–V S
100 ?
–15V
OR
GROUND
V OUT
–
R3
5
9
A2
10
8
12
R6
11
13
2
16
+V S
–V S
10V
R C
LIMITED BY
Q 1 AND R C
POWER
DISSIPATION
RTD = ? K4515
0.24°C/mW SELF-HEATING
Figure 36. Precision Current Source for RTD
Figure 37. Boosted Precision Current Source
LOAD
V IN
+
–
R4
R1
–
E O
+
R3
R2
V 1
V 2
+
–
+
–
R4
R1
–
E O
+
R3
R2
Figure 38. Bridge Transducer Excitation—Unipolar Drive
Rev. L | Page 17 of 20
Figure 39. Bridge Transducer Excitation—Bipolar Drive
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
GCA10DRSD-S288
CONN EDGECARD 20POS .125 EXTEND
SJP7401-4-50-WHITE
LOOP WHITE 4" X 50YD X 0.11"
GBM06DCMT
CONN EDGECARD 12POS .156 WW
EBA06DRSI-S288
CONN EDGECARD 12POS .125 EXTEND
IRDC3841W
BOARD EVAL FOR IR3841W 8A CONV
TARQ474M035
CAP TANT 0.47UF 35V 20% AXIAL
GCM06DCCN-S189
CONN EDGECARD 12POS R/A .156 SLD
A9CAA-0803E
FLEX CABLE - AFK08A/AE08/AFH08T
相关代理商/技术参数
AD588BD
制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage Reference
AD588BQ
功能描述:IC VREF SERIES PREC ADJ 16-CDIP RoHS:否 类别:集成电路 (IC) >> PMIC - 电压基准 系列:- 标准包装:2,000 系列:- 基准类型:旁路，可调节，精度 输出电压:1.24 V ~ 16 V 容差:±0.5% 温度系数:- 输入电压:1.24 V ~ 16 V 通道数:1 电流 - 阴极:100µA 电流 - 静态:- 电流 - 输出:20mA 工作温度:-40°C ~ 85°C 安装类型:通孔 封装/外壳:TO-226-3、TO-92-3（TO-226AA）成形引线 供应商设备封装:TO-92-3 包装:带卷 (TR)
AD588JQ
功能描述:IC VREF SERIES PREC ADJ 16-CDIP RoHS:否 类别:集成电路 (IC) >> PMIC - 电压基准 系列:- 标准包装:1,000 系列:- 基准类型:旁路，可调节，精度 输出电压:2.495 V ~ 36 V 容差:±0.5% 温度系数:标准值 34ppm/°C 输入电压:2.495 V ~ 36 V 通道数:1 电流 - 阴极:1mA 电流 - 静态:- 电流 - 输出:100mA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:TO-243AA 供应商设备封装:SOT-89-3 包装:带卷 (TR)
AD588KQ
功能描述:IC VREF SERIES PREC ADJ 16-CDIP RoHS:否 类别:集成电路 (IC) >> PMIC - 电压基准 系列:- 标准包装:2,000 系列:- 基准类型:旁路，可调节，精度 输出电压:1.24 V ~ 16 V 容差:±0.5% 温度系数:- 输入电压:1.24 V ~ 16 V 通道数:1 电流 - 阴极:100µA 电流 - 静态:- 电流 - 输出:20mA 工作温度:-40°C ~ 85°C 安装类型:通孔 封装/外壳:TO-226-3、TO-92-3（TO-226AA）成形引线 供应商设备封装:TO-92-3 包装:带卷 (TR)
AD588SD
制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage Reference
AD588SD/883B
制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage Reference
AD588SE
制造商:Rochester Electronics LLC 功能描述:- Bulk
AD588SE/883B
制造商:Analog Devices 功能描述:V-Ref Programmable ±5V/±10V 20-Pin LCC Tube